Love my Maggie arms! Great with high compliance carts.
That Amphenol plug(222-11N07) was discontinued in the 80's.
Not an easy item to find, but- in reality; it shouldn't ever
have to be replaced. I bought a couple extra arms, so I
could cannibalize one, make an adapter and
use
a Tricon Analog phono cable, instead of the old one. This
is the only supplier that I've found to have any NOS plugs
left(to the tune of $90+): (http://www.semiconductor500.com/store/index.php?main_page=product_info&products_id=23382&zenid=062191ae763593d8f853cd31b69cd84e)